TW201633076A - Stylus pen - Google Patents

Abstract

A stylus pen and a touch panel are provided. The stylus pen includes: a conductive tip configured to receive an electric field transmission signal from at least one electrode of the touch panel; a circuit portion configured to generate an electric field receiving signal corresponding to the received electric field transmission signal; a variable capacitor between the conductive tip and the circuit portion, and configured to vary the electric field receiving signal depending on a writing pressure applied to the conductive tip; and a conductive body outside the variable capacitor and electrically connecting the conductive tip and the circuit portion.

Description

Stylus and touch panel

The apparatus and method according to an exemplary embodiment relate to a stylus and a touch panel, and more particularly, to connecting a second electrode of a variable capacitor in the absence of a separate connecting member A stylus to the circuit portion and a touch panel.

Recently, smart phones and tablets have become more and more popular, and techniques for engaging position measuring elements embedded therein have been actively developed. Smart phones and tablets are usually provided with a touch screen, and the user can use, for example, a stylus to specify a particular coordinate of the touch screen. The user can input a specific signal to the smart phone by pointing out the specific coordinates of the touch screen.

In addition, the touch screen can sense both the position of the stylus and the writing pressure at the corresponding position, thereby performing various actions according to the position and the writing pressure. To sense the writing pressure of the stylus, the stylus is provided with a variable capacitor whose capacitance changes according to the writing pressure of the stylus.

The variable capacitor can change the capacitance according to the distance between the two electrodes or the change in the area between the two electrodes. For example, the stylus can use a variable capacitor whose capacitance changes according to the change in the area between the two electrodes.

In the stylus pen using such a variable capacitor, since the two electrodes of the capacitor are arranged in the vertical direction of the pen and the resonance circuit is arranged in the rear end of the pen, it is difficult to place the electrode near the front end of the pen Connect to the resonant circuit.

In order for the stylus to have a minimum diameter, a technique for connecting the two electrodes of the variable capacitor to the resonance circuit without changing the diameter of the stylus is required.

To overcome the above disadvantages and other problems associated with prior art configurations, aspects of one or more exemplary embodiments have been presented. An aspect of an exemplary embodiment relates to a stylus and a touch panel capable of connecting a second electrode of a variable capacitor to a circuit portion in the absence of a separate connecting member.

According to an aspect of the exemplary embodiment, a stylus for inputting a position on a touch panel is provided, the stylus pen includes: a conductive tip for receiving an electric field from at least one electrode of the touch panel Transmitting a signal; a circuit portion for generating an electric field receiving signal corresponding to the received electric field transmission signal; a variable capacitor between the conductive tip and the circuit portion, and for applying to the The electric field receiving signal is changed by the writing pressure of the conductive tip; and the electric conductor is located outside the variable capacitor and electrically connected to the conductive tip and the circuit portion.

The variable capacitor may include: a dielectric body including a first surface and a second surface positioned opposite to the first surface; a first electrode contacting the first surface of the dielectric body; and conductivity The variable electrode is configured such that a contact area between the conductive variable electrode and the second surface of the dielectric body changes according to a pressure applied via the conductive tip.

The conductive variable electrode may be configured such that a central portion of a surface in contact with the second surface of the dielectric body protrudes from an edge portion of the surface.

The conductive variable electrode may be configured such that a central portion of a surface in contact with the second surface of the dielectric body is recessed from an edge portion of the surface.

The conductive variable electrode may include a conductive rubber.

The stylus may further include an elastic member located inside the conductive variable electrode.

The stylus may further include a ground portion electrically connected to the user via at least one of direct contact and capacitive coupling.

The stylus may further include a conductive shell that is isolated from the electrical conductor and connected to the ground.

The stylus may further include an elastic member for restoring the position of the conductive tip.

The stylus may further include a housing having a tube shape and housing the variable capacitor, wherein the housing may be formed of a non-conductive material and may include at least one opening, the at least one opening Located on an outer circumferential surface of the housing and the electrical conductor passes through the at least one opening.

The stylus may further include an insulator on an outer circumferential surface of the conductive tip to isolate the conductive tip from the elastic member and the variable capacitor.

The insulator may include a first cover and a second cover; and the first cover may be located on an end of the housing and support a first end of the elastic member, and the second cover A body may be located on the outer circumferential surface of the conductive tip and support the second end of the elastic member.

The insulator may include a guiding member located on the outer circumferential surface of the conductive tip and configured to guide the conductive tip in a length direction of the housing.

The guiding member may support the first end of the elastic member, and a protrusion on an inner circumferential surface of the housing may support the second end of the elastic member.

The elastic member may comprise a non-conductive material.

The stylus may further include a conductive support member including a first receiving hole in the first end portion of the conductive support member and the conductive support member a second receiving hole in the opposite second end of the first end, wherein the first receiving hole is coupled to the conductive variable electrode, and wherein the second receiving hole is engageable with the conductive tip The end portions are coupled.

The stylus may further include an insulator on an outer circumferential surface of the conductive support member to isolate the conductive support member from the elastic member.

The electrical conductor may include a plurality of plates and a circular member connected to an end of each of the plurality of plates; the plurality of plates may be spaced apart from each other and disposed side by side; The circular member can include an opening through which the electrically conductive tip passes.

The circuit portion may include a capacitor having a predetermined capacitance, and a switch configured to allow the capacitor to be selectively connected in parallel to the variable capacitor.

The first end of the variable capacitor may be directly connected to an end of the circuit portion, and the second end of the variable capacitor may be connected to the circuit portion via the electrical conductor.

According to another aspect of the present invention, a stylus pen includes: a conductive tip protruding from an end of the stylus; a dielectric body including a first surface and a position and a second surface opposite to the first surface; a first electrode contacting the first surface of the dielectric; a conductivity variable electrode configured to cause the conductive variable electrode and the dielectric a contact area between the second surfaces of the body changes according to a pressure applied through the conductive tip; and an electrical conductor, located outside the dielectric body, electrically connecting the conductive tip to the A conductive variable electrode is isolated from the dielectric body and the first electrode.

The stylus may further include an elastic member that is isolated from the conductive tip and used to restore the position of the conductive tip.

The stylus may further include a housing formed of a non-conductive material and including at least one opening on an outer circumferential surface of the housing, the electrical conductor passing through the at least one Opening.

The stylus may further include an insulator on an outer circumferential surface of the conductive tip to isolate the conductive tip from the elastic member.

The insulator may include a first cover and a second cover; and the first cover may be located on an end of the housing and support a first end of the elastic member, and the second cover A body may be located on the outer circumferential surface of the conductive tip and support the second end of the elastic member.

The insulator may include a guiding member located on the outer circumferential surface of the conductive tip and configured to guide the conductive tip in a length direction of the housing.

The guiding member may support the first end of the elastic member, and a protrusion on an inner circumferential surface of the housing may support the second end of the elastic member.

According to an aspect of still another exemplary embodiment, there is provided a touch panel for determining an input position of an input object, the touch panel including: at least one electrode; and a controller to control the at least one electrode The electric field transmission signal generated in the transmission is transmitted to the input object, and controls receiving, by the at least one electrode, an electric field receiving signal corresponding to the electric field transmission signal from the input object.

The controller can be configured to determine the input location of the input object based on the at least one electrode receiving the electric field receiving signal.

The controller can be configured to determine the input position and pressure of the input object to the touch panel based on the received electric field receiving signal.

The touch panel may further include: a driver for controlling transmission of the electric field transmission signal from the at least one electrode according to control of the controller; and a receiver for receiving the via the at least one electrode An electric field receives a signal, wherein the controller is operative to control the driver and the receiver to operate alternately.

According to an aspect of still another exemplary embodiment, an input object for inputting a position on a touch panel is provided, the input object comprising: a conductive tip for at least one electrode from the touch panel Receiving an electric field transmission signal; the circuit portion configured to generate an electric field receiving signal corresponding to the received electric field transmission signal, such that the electric field receiving signal changes according to a pressure applied to the conductive tip; and an electric conductor, electricity The conductive tip is connected to the circuit portion.

The input object may further include a variable capacitor between the conductive tip and the circuit portion and configured to change the electric field depending on a pressure applied to the conductive tip Receive signals.

The circuit portion may include a capacitor having a predetermined capacitance, and a switch configured to allow the capacitor to be selectively connected in parallel to the variable capacitor.

The first end of the variable capacitor may be directly connected to an end of the circuit portion, and the second end of the variable capacitor may be connected to the circuit portion via the electrical conductor.

The input article may further include an elastic member for restoring the position of the conductive tip.

The input object may further include a housing formed of a non-conductive material and including at least one opening on an outer circumferential surface of the housing, the electrical conductor passing through the at least one opening .

The input object may further include an insulator on an outer circumferential surface of the conductive tip to isolate the conductive tip from the elastic member.

The insulator may include a first cover and a second cover; and the first cover may be located on an end of the housing and support a first end of the elastic member, and the second cover A body may be located on the outer circumferential surface of the conductive tip and support the second end of the elastic member.

The insulator may include a guiding member located on the outer circumferential surface of the conductive tip and configured to guide the conductive tip in a length direction of the housing.

The guiding member may support the first end of the elastic member, and a protrusion on an inner circumferential surface of the housing may support the second end of the elastic member.

Other objects, advantages and salient features of the present invention will become apparent from the Detailed Description of the Description.

In the following, certain exemplary embodiments will be described in detail with reference to the accompanying drawings, in which the same reference numerals will be understood to refer to the same components, components, and structures.

The matters defined herein, such as the detailed construction and elements thereof, are provided to facilitate a broad understanding of the description. Thus, it is apparent that the exemplary embodiments can be implemented without the defined content. In addition, well-known functions or constructions are omitted to provide a clear and concise description of the exemplary embodiments. In addition, the dimensions of the various elements in the figures may be arbitrarily increased or decreased to facilitate a broad understanding. In the following, it should be understood that expressions such as "at least one of", when used in the context of a series of elements, are used to modify the entire series of elements, rather than merely modifying the individual elements of the series.

FIG. 1 is a block diagram illustrating a configuration of a coordinate measurement system 300 in accordance with an exemplary embodiment.

Referring to FIG. 1, the coordinate measuring system 300 includes a touch panel 200 and an input object. Although one or more exemplary embodiments are disclosed with respect to stylus 100 as an input object, it should be understood that one or more other exemplary embodiments are not limited thereto.

The touch panel 200 determines the position of the stylus 100. Specifically, the touch panel 200 includes a plurality of electrodes, and the electric field transmission signal (eg, a driving signal) is transmitted to the electric field transmission signal via capacitive coupling by applying an electric field transmission signal to at least one of the plurality of electrodes. A resonance circuit of an object (for example, a stylus pen) that is adjacent to the touch panel 200.

The touch panel 200 can determine the position of the stylus pen 100 by receiving a response signal (eg, an electric field receiving signal) generated in the resonant circuit of the stylus pen 100 through at least one of the plurality of electrodes. A specific configuration and operation of the touch panel 200 according to an exemplary embodiment will be explained below with reference to FIG. Here, the touch panel 200 may include a tablet computer, a digitizer, a touch pad, and a touch screen. In addition, the touch panel 200 can be implemented in a notebook computer, a mobile phone, a smart phone, a portable multimedia player (PMP), an MP3 player, an electronic blackboard, and the like.

The stylus 100 forms a capacitance with at least one of the plurality of electrodes in the touch panel 200, and can receive energy for resonance (eg, an electric field transmission signal) via the formed capacitance.

The stylus 100 can transmit a response signal (eg, an electric field receiving signal) generated by the resonant circuit to the at least one electrode in the touch panel 200. The stylus 100 can be implemented as a pen, but is not limited thereto. A specific configuration and operation of the stylus pen 100 in accordance with one or more exemplary embodiments will be explained below with reference to FIGS. 2 through 26.

Since the coordinate measurement system 300 according to an exemplary embodiment is configured such that the touch panel 200 provides an electric field transmission signal to the stylus pen 100 via capacitive coupling, the stylus 100 can be in its own when there is capacitive coupling The power supply does not exist or does not operate with its own power supply.

That is, although the stylus 100 is illustrated as operating in a passive manner in the above exemplary embodiments, it should be understood that one or more other exemplary embodiments are not limited thereto. For example, stylus 100 in accordance with another exemplary embodiment may also operate in an active manner with its own power supply.

Further, in the above exemplary embodiment, the touch panel 200 is explained as determining the position of the stylus pen 100 including the resonance circuit. However, it should be understood that one or more other exemplary embodiments are not limited to stylus 100. For example, according to another exemplary embodiment, the touch panel 200 can be determined by detecting a change in a capacitance of an electrode of the plurality of electrodes according to a change in a position of the finger 10 or a signal level change caused by a change in capacitance. The position of the finger 10.

Further, in the above exemplary embodiment, the connection of the single stylus pen 100 to the touch panel is explained. However, it should be understood that one or more other exemplary embodiments are not limited thereto. For example, according to another exemplary embodiment, a plurality of stylus pens 100 may be connected to a single touch panel 200. In this case, the touch panel 200 can detect the position of each of the plurality of styluses 100.

FIG. 2 is a view illustrating a configuration of the stylus pen 100 illustrated in FIG. 1 according to an exemplary embodiment.

Referring to FIG. 2 , the stylus 100 may include a conductive tip 110 , a resonant circuit portion 120 , and a ground portion 130 . The stylus 100 can be implemented as a pen shape.

The conductive tip 110 forms a capacitance with at least one of the plurality of electrodes in the touch panel 200. The conductive tip 110 can be formed, for example, from a metal tip. The conductive tip 110 can be disposed inside the non-conductive material, or a portion of the conductive tip 110 can be exposed to the outside. Further, in order to achieve a smooth writing feeling at the time of use, it may further include preventing the conductive tip 110 from directly contacting the external insulating portion.

The resonant circuit portion 120 (or circuit portion) may include a variable capacitor and a parallel resonant circuit including a capacitor and an inductor connected to the conductive tip 110.

The resonant circuit portion 120 can receive energy for resonance (eg, an electric field transmission signal) via capacitive coupling between the at least one electrode in the touch panel 200 and the conductive tip 110. In detail, the resonant circuit portion 120 can resonate with an electric field transmission signal input from the touch panel 200. Even after the input of the electric field transmission signal has been stopped, the resonance circuit portion 120 can receive the signal by the resonance output electric field. For example, the resonant circuit portion 120 can output a sine wave signal having a resonant frequency of the resonant circuit portion 120.

In the resonance circuit portion 120, the resonance frequency can be changed in accordance with the change in the contact pressure of the conductive tip 110 in accordance with the capacitance of the variable capacitor. This operation will be explained below with reference to FIG. 3.

Further, in the resonance circuit portion 120, the capacitance of the capacitor or the inductance of the inductor changes depending on the manipulation of the user, so that the resonance frequency can be changed. This operation will be explained below with reference to FIG.

FIG. 3 is a view illustrating a circuit diagram of the stylus pen 100 illustrated in FIG. 1.

Referring to FIG. 3, the resonant circuit portion 120 may include an inductor 125, a capacitor 126, and a variable capacitor 121. One end of the resonant circuit portion 120 is connected to the conductive tip 110, and the other end thereof may be grounded.

The inductor 125 is connected in parallel with the capacitor 126 and functions as a resonant circuit. The resonant circuit can have high impedance characteristics at a particular resonant frequency.

The variable capacitor 121 is connected in parallel with the resonance circuit, and its capacitance can be changed in accordance with the change in the contact pressure of the conductive tip 110. Therefore, when the capacitance of the variable capacitor 121 changes, the capacitance of the entire resonance circuit is also changed, so that the resonance frequency of the resonance circuit can be changed. In other words, the variable capacitor 121 can change the electric field receiving signal according to the writing pressure being applied to the conductive tip 110. The specific shape and operation of the variable capacitor 121 in accordance with one or more exemplary embodiments will be explained below with reference to FIGS. 6 through 12.

Since the response signal provided to the touch panel 200 according to the first exemplary embodiment changes according to the contact pressure with respect to the touch panel 200, the touch panel 200 can detect not only the touch signal based on the response signal of the stylus 100 The position of the pen 100 is controlled, and the writing pressure of the stylus pen 100 is also detected.

In the above exemplary embodiment, the variable capacitor 121 is used to change the resonance frequency. However, it should be understood that one or more other exemplary embodiments are not limited thereto. For example, according to another exemplary embodiment, the resonant circuit portion 120 that performs the same function using a variable inductor that can vary depending on the contact pressure of the conductive tip 110 can be implemented .

4 is a perspective view illustrating the writing pressure module 190' of the stylus shown in FIG. 3, and FIG. 5 is an exploded perspective view illustrating the writing pressure module 190' of the stylus shown in FIG.

Referring to FIGS. 4 and 5 , the writing pressure module 190 ′ of the stylus pen 100 according to an exemplary embodiment may include a variable capacitor 121 , a conductive tip 110 , an elastic member 160 , a housing 140 , an insulator 150 , and an electrical conductor 127 . The first conductive support member 171 and the second conductive support member 172.

The conductive tip 110 is disposed in the front end of the stylus 100, and receives pressure according to the writing pressure of the user when the stylus 100 is placed on the touch panel 200. The conductive tip 110 can receive an electric field transmission signal generated in at least one of the plurality of electrodes included in the touch panel 200. According to an exemplary embodiment, in order to prevent the conductive tip 110 from directly contacting the outside, the insulating portion 111 may be disposed in the outer surface of the conductive tip 110.

The variable capacitor 121 is physically connected to the conductive tip 110 via the housing 140 or the like, and applies pressure to the variable capacitor 121 in accordance with the longitudinal movement of the conductive tip 110. The variable capacitor 121 includes a dielectric body 122, a first electrode 123, and a conductive variable electrode 124. A specific form of the dielectric body 122 according to an exemplary embodiment will be explained below with reference to FIG. 6, and a specific form of the first electrode 123 according to an exemplary embodiment will be explained below with reference to FIG. 7, and will be explained below with reference to FIGS. 8 to 12. A particular form of the electrically conductive variable electrode 124 in accordance with one or more exemplary embodiments.

The electrical conductor 127 is electrically connected to the conductive tip 110 and the parallel resonant circuit. In detail, the electrical conductors 127 are arranged outside the variable capacitor 121 and can be electrically connected to the conductive tip 110 and the parallel resonant circuit. A specific shape of the electrical conductor 127 according to an exemplary embodiment will be explained below with reference to FIG.

The housing 140 has a tube shape to receive the variable capacitor 121. A specific shape of the housing 140 according to an exemplary embodiment will be explained below with reference to FIG.

The insulator 150 is arranged on the outer circumferential surface of the conductive tip 110. In detail, the insulator 150 may include a first cover and a second cover. Specific operations and configurations of the insulator 150 in accordance with one or more exemplary embodiments are set forth below with reference to FIGS. 15 and 16.

The resilient member 160 restores the position of the conductive tip 110. In detail, the elastic member 160 can press the guiding member 153 in a direction away from the protrusion 141 formed (provided) on the inner circumferential surface of the housing 140.

A receiving groove is formed in each of the opposite ends of the conductive support member 170 (see FIG. 17A). The insulator 150 is disposed on the outer circumferential surface of the conductive support member 170 such that the conductive support member 170 is insulated from the elastic member 160. Specific functions and forms of the conductive support member 170 in accordance with one or more exemplary embodiments are set forth below with reference to FIGS. 17A and 17B.

FIG. 6 is a cross-sectional view illustrating a dielectric body 122 of the variable capacitor 121 illustrated in FIG. 5, according to an exemplary embodiment.

Referring to FIG. 6, the dielectric body 122 may be formed in a disk shape having a predetermined thickness. The dielectric body 122 includes a first surface 122a and a second surface 122b opposite the first surface 122a. Dielectric body 122 can have a predetermined permittivity.

The dielectric body 122 can be received in an opening formed in the other end of the housing 140 as will be described below such that the first surface 122a and the second surface 122b of the dielectric body 122 are perpendicular to the length direction of the housing 140. The first surface 122a of the dielectric body 122 received in the opening may contact the first electrode 123 of the variable capacitor 121, and the second surface 122b of the dielectric body 122 may be spaced apart from the conductive variable electrode 124 of the variable capacitor 121 The conductive variable electrode 124 is opened and faced.

FIG. 7 is a cross-sectional view illustrating a first electrode 123 of the variable capacitor 121 illustrated in FIG. 5, according to an exemplary embodiment.

Referring to FIG. 7, the first electrode 123 may be formed in a disk shape having a predetermined thickness. The first electrode 123 includes a first surface 123a and a second surface 123b opposite to the first surface 123a.

The first electrode 123 is disposed such that the first surface 123a and the second surface 123b of the first electrode 123 are perpendicular to the length direction of the housing 140. The first surface 123a is directly electrically connected to one end of the parallel resonant circuit, and the second surface 123b is contactable to the first surface 122a of the dielectric body 122. Further, the first electrode 123 may include a protrusion 123c formed on the first surface 123a directly connected to the one end portion of the parallel resonance circuit and extending along the length direction of the case 140. Here, the size of the second surface 123b may be the same as or larger than the size of the first surface 122a of the dielectric body 122.

FIG. 8 is a cross-sectional view illustrating a conductivity variable electrode 124 of the variable capacitor 121 illustrated in FIG. 5, according to an exemplary embodiment.

Referring to FIG. 8, the conductivity variable electrode 124 may be formed in a cylindrical shape extending in the longitudinal direction of the housing 140. One end surface 124a of the conductive variable electrode 124 may be formed such that its central portion protrudes from the edge portion thereof toward the outside of the one end surface 124a, and the other end surface 124b of the conductive variable electrode 124 may be flat.

The one end surface 124a of the conductive variable electrode 124 may be disposed away from the second surface 123b of the dielectric body 122, and the other end surface 124b of the conductive variable electrode 124 may receive the pressure applied by the conductive tip 110.

When the other end surface 124b of the conductive variable electrode 124 receives the pressure being applied via the conductive tip 110, the one end surface 124a thereof may immediately contact the second surface 122b of the dielectric body 122.

If pressure is continuously applied via the conductive tip 110, the one end surface 124a of the conductive variable electrode 124 can press the second surface 123b of the dielectric body 122 in the direction in which the pressure is being applied. Therefore, the contact area between the one end surface 124a of the conductive variable electrode 124 and the second surface 122b of the dielectric body 122 can be increased.

If the pressure being applied via the conductive tip 110 is reduced, the amount of force that causes the one end surface 124a of the conductive variable electrode 124 to press the second surface 122b of the dielectric body 122 is also reduced. Therefore, the contact area between the one end surface 124a of the conductive variable electrode 124 and the second surface 122b of the dielectric body 122 can be reduced.

If the pressure applied via the conductive tip 110 is completely removed, the one end surface 124a of the conductive variable electrode 124 does not press the second surface 122b of the dielectric body 122, whereby the conductive variable electrode 124 is The one end surface 124a and the second surface 122b of the dielectric body 122 may be spaced apart from each other by the elastic members 160 which will be explained below.

Fig. 9 is a perspective view for explaining another example of the conductive variable electrode 124' of the variable capacitor 121 shown in Fig. 5, and Fig. 10 is a cross-sectional view for explaining the conductive variable electrode 124' shown in Fig. 9.

Referring to Figs. 9 and 10, the conductive variable electrode 124' may be formed in a cylindrical shape extending in the longitudinal direction of the casing 140. One end surface 124'a of the conductive variable electrode 124' may be formed such that the edge portion 124'c is inclined upward toward the central portion of the one end surface 124'a, and the center portion is formed in the recess portion 124'e . Therefore, the boundary 124'd between the edge portion 124'c and the recess portion 124'e can be formed to protrude outward from the one end surface 124'a.

When the other end surface 124'b of the conductive variable electrode 124' receives the pressure being applied via the conductive tip 110, the boundary 124'd formed to protrude from the one end surface 124'a can immediately contact the dielectric The second surface 122b of 122, thereby forming an annular contact area having a hollow shape. In this case, the contact area is different for the same pressure.

The change in the contact area generated according to the pressure change applied through the conductive tip 110 is the same as the change in the contact area of the conductive variable electrode 124 according to the foregoing exemplary embodiment; therefore, no further description thereof will be given herein.

It should be understood that the conductive variable electrode 124 may be formed in various shapes instead of being limited to the above shape.

Further, the conductive variable electrode 124 may be formed of a conductive rubber (for example, including a conductive rubber). Although rubber is usually an insulating material, rubber can be electrically conductive by mixing a conductive material such as metal or carbon. If the pressure applied to the conductive variable electrode 124 via the conductive tip 110 is removed, the conductive variable electrode 124 can be returned to the initial position by the elasticity of the conductive rubber. When returning to the initial position, the contact area between the one end surface 124a of the conductive variable electrode 124 and the second surface 122b of the dielectric body 122 can be reduced.

Fig. 11 is a perspective view showing still another example of the conductive variable electrode 124'' of the variable capacitor 121 shown in Fig. 5, and Fig. 12 is a cross-sectional view of the conductive variable electrode 124'' shown in Fig. 11.

Referring to Figures 11 and 12, the conductive variable electrode 124'' includes an end surface 124''a, another end surface 124''b, and an edge portion 124''c. Further, the elastic member 124''d is embedded in the conductive variable electrode 124'' so that the elastic force of the conductive variable electrode 124'' can be enhanced. The elastic member 124''d may be embedded in a conductive variable electrode made of a conductive rubber (for example, containing a conductive rubber). The contact area between the conductive variable electrode 124'' and the second surface 122b of the dielectric body 122 may vary depending on the elasticity of the conductive rubber and the pressure transmitted through the conductive tip 110. For example, if the pressure transmitted through the conductive tip 110 is the same, the greater the elasticity of the conductive rubber, the smaller the contact area between the conductive variable electrode 124" and the second surface 122b of the dielectric body 122. .

Therefore, the magnitude of the capacitance of the variable capacitor 121 may vary depending on the size of the contact area between the conductive variable electrode 124 and the second surface 122b of the dielectric body 122. When the pressure transmitted through the conductive tip 110 is the same, the magnitude of the contact area may vary depending on the shape and elasticity of the conductive variable electrode 124.

The relationship between the capacitance of the variable capacitor 121 and the contact area between the conductive variable electrode 124 and the second surface 122b of the dielectric body 122 can be measured in advance. The pressure applied to the conductive tip 110 can be determined from the capacitance of the variable capacitor 121 based on previously measured values.

As described above, the contact area between the one end surface 124a of the conductive variable electrode 124 and the second surface 122b of the dielectric body 122 can be changed in accordance with the change in the pressure applied via the conductive tip 110, making it variable The capacitance (ie, electrostatic capacitance) of capacitor 121 can vary.

On the other hand, if the elastic member 124''d is placed inside the conductive variable electrode 124'' as shown in Figs. 11 and 12, the elastic member 160 shown in Figs. 4 and 5 can be omitted. By disposing the elastic member 124''d inside the conductive variable electrode 124'' as described above, the use of the individual elastic member 160 becomes redundant. Therefore, there are advantageous effects in terms of size control, ease of assembly, and yield.

Further, it should be understood that although the variable capacitor 121 as described above has a disk shape, one or more other exemplary embodiments are not limited thereto. For example, according to another exemplary embodiment, the variable capacitor 121 may be in the form of a polygonal disk. In this case, the dielectric body of the variable capacitor 121 and the first surface of the first electrode 123 may also be formed in a polygonal shape.

FIG. 13 is a perspective view illustrating the electrical conductor 127 of FIG. 5, according to an exemplary embodiment.

Referring to FIG. 13, the electrical conductor 127 may include a plurality of plates 127a and 127b that are spaced apart from each other and disposed side by side. The electrical conductor 127 may further include a circular member 127c connected to one end of each of the plurality of plates 127a and 127b.

The electric conductor 127 may be provided with an opening 127d formed in a central portion of the circular member 127c. The conductive tip 110 and the conductive variable electrode 124 of the variable capacitor 121 may be disposed in the opening 127d. Therefore, the conductive tip 110 and the conductive variable electrode 124 of the variable capacitor 121 can be electrically connected to the conductor 127.

Further, other ends of the plurality of plates 127a and 127b of the conductors 127 spaced apart from each other and disposed side by side may be electrically connected to the other end of the parallel resonant circuit. Therefore, the conductor 127 can be electrically connected to the other end of the parallel variable resonant circuit of the variable polarity electrode 124 of the variable capacitor 121.

Therefore, a separate connecting member (for example, a terminal) is not required to connect the conductive variable electrode 124 of the variable capacitor 121 and the other end portion of the parallel resonant circuit. In detail, in the prior art, in order to connect the other ends of the conductive variable electrode and the parallel resonant circuit, an elastic member is disposed outside the conductive variable electrode, and is connected by soldering a metal bar on one side of the elastic member. Conductive variable electrode and parallel resonant circuit. However, in the exemplary embodiment of the present invention, since welding or the like is not required to connect the other ends of the conductive variable electrode 124 and the parallel resonant circuit, mechanical stability is enhanced, and assembly and repair are made easier.

FIG. 14 is a perspective view illustrating the housing 140 illustrated in FIG. 5, according to an exemplary embodiment.

Referring to FIG. 14, the housing 140 may be formed in a tube shape and made of a non-conductive material.

The housing 140 may house the variable capacitor 121 therein, and the outer surface of the housing 140 may have at least one opening 145 that extends in a length direction from one end of the housing 140. The plurality of plates 127a and 127b of the electrical conductor 127 may pass through the at least one opening 145.

In detail, an opening 146 through which the conductive tip 110 passes may be formed in one end of the housing 140, and a first electrode 123 in which the variable capacitor 121 is positioned may be formed in the other end of the housing 140. Opening 147.

Since the at least one opening 145 through which the plurality of plates 127a and 127b of the conductor 127 pass is formed in the outer surface of the housing 140, the conductive variable electrode 124 connected to the variable capacitor 121 is electrically conductive. Body 127 can extend from housing 140 via opening 145.

Therefore, the housing 140 can electrically block the conductive variable electrode 124 from the first electrode 123 of the variable capacitor 121 and the dielectric body 122.

Further, at least one outer support portion 142 and 143 including the guide grooves 142a and 143a may be formed in the outer circumferential surface of the other end portion of the housing 140, and the plurality of plates 127a and 127b of the electric conductor 127 pass through the guide groove 142a. And 143a are guided by the guide grooves 142a and 143a.

The plurality of plates 127a and 127b of the electric conductor 127 supported by the outer support portions 142 and 143 may be disposed to be spaced apart from the first electrode 123 of the variable capacitor 121. Even when an external impact is applied, the risk that the electrical conductor 127 is electrically connected to the first electrode 123 of the variable capacitor 121 can be lowered, thereby providing stable operation.

Further, a ring-shaped protrusion 141 capable of supporting the other end portion (for example, the second end portion) of the elastic member 160 which will be described later may be formed in the inner circumferential surface of the housing 140.

FIG. 15 is a perspective view illustrating a plurality of covers 151 and 152 of the insulator 150 illustrated in FIG. 5, according to an exemplary embodiment.

Referring to FIG. 15, the insulator 150 may include, for example, a first cover 151 and a second cover 152. The first cover 151 may be spaced apart from an end (eg, the first end) of the housing 140 and disposed to be fixed to an outer circumferential surface of the conductive tip 110, thereby supporting one end of the elastic member 160 ( For example, the first end). The second cover 152 may be disposed in an end of the housing 140 and support the other end (eg, the second end) of the elastic member 160.

In detail, the first covering body 151 may be formed in a ring shape extending along the length direction of the conductive tip 110, and includes an opening 151c through which the conductive tip 110 passes.

The first covering body 151 includes an annular protruding portion 151b that surrounds the outer circumferential surface 151a and has a predetermined height in the radial direction from the outer circumferential surface 151a.

The inner circumferential surface of the elastic member 160 may be arranged on the outer circumferential surface 151a of the first covering body 151, and one side of the annular protruding portion 151b formed on the outer circumferential surface 151a of the first covering body 151 may contact and support the elastic member One end of 160.

In detail, the second cover 152 may be formed in a ring shape extending along the length direction of the conductive tip 110 and include an opening 152c through which the conductive tip 110 passes.

The second covering body 152 includes an annular first protruding portion 152b that surrounds the outer circumferential surface 152a and has a predetermined height in the radial direction from the outer circumferential surface 152a. In addition, the second covering body 152 may further include an annular second protruding portion 152d extending along the length direction of the conductive tip 110 on the side surface of the second covering body 152 facing the first covering body 151. . Therefore, the inner circumferential surface of the elastic member 160 may be arranged on the outer circumferential surface of the second protrusion 152d, and one side of the first protrusion 152b of the second cover 152 may contact and support the other end of the elastic member 160.

Therefore, the elastic member 160 can be pressed and contracted by the conductive tip 110 that moves in the direction in which the pressure is being applied. In this case, the elastic member 160 whose other end portion is supported by the second covering body 152 can press the first covering body 151 in a direction away from the second covering body 152. Therefore, when the pressure is removed, the position of the conductive tip 110 fixed to the first cover 151 can be restored by the elastic member 160. In addition, the conductive tip 110 may be isolated from the elastic member 160 by the first cover 151 and the second cover 152 of the insulator 150.

FIG. 16 is a perspective view illustrating a guiding member 153 of the insulator 150 illustrated in FIG. 5, according to an exemplary embodiment.

Referring to FIG. 16, as another example, the insulator 150 may be formed as a guiding member 153 that is fixedly disposed on an outer circumferential surface of the conductive tip 110 and guides the conductive tip 110 in the length direction of the housing 140.

In detail, the guiding member 153 is provided with an opening 153a and can be fixed to the outer circumferential surface of the conductive tip 110 passing through the opening 153a.

The guiding member 153 includes an annular protrusion 153b that surrounds the outer circumferential surface 153f and has a predetermined height in the radial direction from the outer circumferential surface 153f.

The annular protrusion 153b may be provided with at least one opening 153g extending in a length direction from one end of the annular protrusion 153b, and the plurality of plates 127a and 127b of the electric conductor 127 may pass through the At least one opening 153g. The plurality of plates 127a and 127b passing through the electric conductor 127 of the at least one opening 153g may be supported by the support portions 153d and 153e formed in the outer circumferential surface of the annular projection 153b, and may extend to the outside of the guiding member 153 .

The side surfaces of the support portions 153d and 153e may support one end portion of the elastic member 160.

Further, the guiding member 153 is provided with at least one protrusion 153c formed on the outer circumferential surface of the annular protrusion 153b and receivable on the side surface of the housing 140 along the length of the housing 140 The direction is formed in at least one of the elongated holes 144a and 144b.

When the at least one protrusion 153c is received in the at least one elongated hole 144a and 144b formed on a side surface of the housing 140, the guiding member 153 may be in the housing 140 while being disposed in the housing 140 Guided in the length direction.

Further, when the guiding member 153 is guided in the longitudinal direction of the housing 140, the conductive tip 110 fixed to the guiding member 153 may also be guided in the longitudinal direction of the housing 140.

Therefore, when the conductive tip 110 moves in the direction in which the pressure is applied, the elastic member 160 whose other end portion is supported by the protrusion 141 formed on the inner circumferential surface of the housing 140 can be pressed and contracted. In this case, the elastic member 160 may press the guiding member 153 in a direction away from the protrusion 141 formed in the inner circumferential surface of the housing 140. Therefore, the position of the conductive tip 110 can be restored by the elastic member 160 when the pressure is removed. Further, the guiding member 153 of the insulator 150 may insulate the elastic member 160 from the conductive tip 110.

17A and 17B are perspective views illustrating a state in which the first conductive support member 171 and the second conductive support member 172 illustrated in FIG. 5 are coupled to each other, according to an exemplary embodiment.

Referring to FIGS. 17A and 17B, the conductive support member 170 may include one end portion and the other end portion, the one end portion being partially received in the housing 140 and disposed in the housing 140, the other end portion being disposed in the housing Outside of the one end of the housing 140. Further, the conductive support member 170 may include a first receiving hole 171c and a second receiving hole 172a formed in opposite ends of the support member 170.

In detail, the conductive support member 170 may be provided with a first receiving hole 171c and a second receiving hole 172a formed in the other end portion of the conductive support member 170 and connected to the conductive tip 110 The one end portion, the second receiving hole 172a is formed in the one end portion of the conductive support member 170 and is connected to the conductive variable electrode 124.

The conductive support member 170 may include a first conductive support member and a second conductive support member 172.

A first receiving hole 171c that can receive the conductive tip 110 is formed in the other end of the first conductive support member 171, and the other end of the first conductive support member 171 can be outward in the radial direction extend. The outer circumferential surface of the first conductive support member 171 may contact and support the inner circumferential surfaces of the first cover 151 and the second cover 152, and the first cover 151 may be mounted on the outwardly extending outer extension 171b and It is fixed to the outer extension 171b.

The second conductive support member 172 may be provided with a second receiving hole 172a that can receive the conductive variable electrode 124 of the variable capacitor 121 and be formed in one end of the second conductive support member 172. Further, the other end portion 172b of the second conductive support member 172 may be formed to have the same diameter as the diameter of the opening 153a of the guiding member 153 such that the inner circumferential surface of the opening 153a of the guiding member 153 may be mounted to the other end Part 172b. Further, referring to FIG. 20, a third receiving hole 172c may be formed in the other end portion of the second conductive support member 172, and the third receiving hole 172c may receive the one end portion of the first conductive supporting member 171.

If the receiving hole 171c in which the conductive tip 110 is received is loosened by the force applied to the conductive tip 110 in different directions, it may only be necessary to replace the first conductive support having the receiving hole 171c coupled to the conductive tip 110. Member 171. Therefore, the maintenance of the stylus pen 100 can be easily performed.

When the contact pressure between the touch panel 200 and the stylus pen 100 is applied to the conductive support member 170 via the conductive tip 110, the conductive support member 170 can transmit the applied pressure to the conductivity of the variable capacitor 121. Variable electrode 124. The pressure transmitted by the conductive support member 170 can deform the conductive variable electrode 124 of the variable capacitor 121.

The operation in which the capacitance of the variable capacitor 121 is changed according to the pressure being applied via the conductive tip 110 is the same as or similar to that described above; therefore, no further description is provided herein.

Fig. 18 is a side view for explaining another example of the elastic member 160' shown in Fig. 5, and Fig. 19 is a side view for explaining still another example of the elastic member 160'' shown in Fig. 5.

Referring to FIG. 18, the elastic member 160' according to another exemplary embodiment may be formed of a leaf spring, and referring to FIG. 19, the elastic member 160'' according to another exemplary embodiment may be formed of a bellows spring. Since the leaf spring shown in FIG. 18 or the bellows spring shown in FIG. 19 can be formed such that its outer surface is surrounded by the insulator 150, the leaf spring or the bellows spring can be isolated from the conductive tip 110 or the conductive support member 170.

FIG. 20 is a cross-sectional view taken along line I-I of FIG. 4, according to an exemplary embodiment.

Referring to Figure 20, a writing pressure module 190' is illustrated in which the resilient member 160 is disposed between the first cover 151 and the second cover 152.

FIG. 21 is a perspective view illustrating another example of the writing pressure module 190'' of the stylus pen 100 of FIG. 3, according to an exemplary embodiment. Figure 22 is an exploded perspective view illustrating the writing pressure module 190'' of Figure 21, in accordance with an exemplary embodiment. 23 is a cross-sectional view taken along line II-II of FIG. 21, according to an exemplary embodiment.

Referring to Figures 21 to 23, a perspective view of the writing pressure module 190'' in which the elastic member 160 is disposed between the guiding member 153 and the inner circumferential surface of the housing 140 is illustrated. In this case, the first covering body 151 and the second covering body 152 may be omitted. Further, in the exemplary embodiment of the present invention, the guiding member 153 supports the first end portion of the elastic member 160, and the protrusion 141 on the inner circumferential surface of the housing 140 supports the second end portion of the elastic member 160. The configuration and operation of the writing pressure module 190'' is the same as or similar to the configuration and operation of the writing pressure module 190' in which the elastic member 160 is disposed between the first covering body 151 and the second covering body 152; therefore, this document It will not be repeated in the middle.

FIG. 24 is a view illustrating a circuit diagram of a stylus pen 100' according to another exemplary embodiment.

Referring to Fig. 24, the resonant circuit portion 120' may include an inductor 125, a capacitor 126, a variable capacitor 121, a second capacitor 128, and a switch 129.

The inductor 125 is connected in parallel with the capacitor 126 and functions as a parallel resonant circuit. The parallel resonant circuit can have high impedance characteristics at a particular resonant frequency.

Since the variable capacitor 121 is electrically connected in parallel with the parallel resonant circuit and physically connected to the conductive tip 110, its capacitance may vary depending on the contact pressure of the conductive tip 110. Therefore, when the contact pressure of the conductive tip 110 changes, the capacitance of the variable capacitor 121 changes, and thus the capacitance of the resonance system is also changed so that the resonance frequency can be changed.

The second capacitor 128 has a predetermined capacitance and is connected in parallel with the parallel resonance circuit described above.

Switch 129 can receive the user's on/off command and allow second capacitor 128 to be selectively coupled in parallel with the parallel resonant circuit in accordance with the user's on/off command. Therefore, when the user turns on the switch 129, the second capacitor 128 is connected in parallel with the parallel resonant circuit to change the resonant frequency of the resonant system. At this time, the changed resonance frequency may be different from the variation range of the variable capacitor 121 as described above. For example, if the variation of the resonance frequency according to the change of the variable capacitor 121 is within 5 kHz, the variation range of the resonance frequency according to the operation of the switch 129 may exceed 5 kHz. Therefore, the touch panel 200 can detect whether the change in the resonance frequency is due to the change of the variable capacitor 121 or the on/off operation of the switch 129 by the range of the changed resonance frequency. Further, it can be implemented to simultaneously perform a change in the resonance frequency caused by the variable capacitor 121 and a change in the resonance frequency caused by the switch 129.

As described above, since the stylus pen 100' according to the second exemplary embodiment is formed such that the resonance frequency is changed according to the switching operation of the user, the touch panel 200 can easily detect the operation of the stylus pen 100'. mode.

In the above exemplary embodiment, the second capacitor 128 connected in series with the switch is used to change the resonance frequency. However, it should be understood that one or more other exemplary embodiments are not limited thereto. For example, according to another exemplary embodiment, the resonant circuit portion 120' can be implemented to perform the above functions using an inductor or other circuit component instead of a capacitor.

Fig. 25 is a perspective view illustrating the stylus pen 100' according to the second exemplary embodiment, and Fig. 26 is a cross-sectional view taken along line III-III of Fig. 25.

Referring to Figures 25 and 26, the stylus 100' according to the second exemplary embodiment may be provided with a switch 129 disposed on an outer surface thereof and operable by a user. The conductive shell 131 is arranged on the outer surface such that a portion of the parallel resonant circuit is grounded to the ground by the user's gripping action. The stylus 100 ′ includes a connecting portion 132 having a screw 133 , and the connecting portion 132 is connected to the conductive shell 131 via a printed circuit board (PCB) 134 to electrically connect the conductive shell 131 and include a parallel resonant circuit. Printed circuit board 134.

The conductive shell 131 is isolated from the electrical conductor 127 and electrically connected to a ground potential within the printed circuit board 134.

In the stylus pen 100 according to the first exemplary embodiment, the conductive case 131 is not illustrated. However, it should be understood that the conductive case 131 shown in FIGS. 25 and 26 can be similarly applied to the stylus pen 100 according to the first exemplary embodiment, except for the hole in which the switch 129 is disposed.

FIG. 27 is a block diagram illustrating a specific configuration of the touch panel 200 illustrated in FIG. 1 according to an exemplary embodiment.

Referring to FIG. 27, the touch panel 200 may include a channel electrode portion 210, a driving unit 220 (for example, a driver or a driver), a receiving unit 230 (for example, a receiver), and a controller 240.

The channel electrode portion 210 includes a plurality of electrodes. In detail, the channel electrode portion 210 may include a plurality of electrodes disposed in a matrix form. For example, the channel electrode portion 210 may include a first electrode group disposed in a first direction and a second electrode group disposed in a second direction perpendicular to the first direction.

The first electrode group may include a plurality of first electrodes 211-1, 211-2, 211-3, 211-4, 211-5, and 211-6 disposed in a first direction (eg, a vertical direction). Here, the first electrode is a transparent electrode and may be formed of indium tin oxide (ITO). The plurality of first electrodes 211-1, 211-2, 211-3, 211-4, 211-5, and 211-6 of the first electrode group may be used for transmitting a predetermined position when the position of the finger is detected. The transmission electrode of the transmission signal (Tx signal).

The second electrode group may include a plurality of second electrodes 212-1, 212-2, 212-3, 212-4, 212-5, and 212-6 disposed in a second direction (eg, a horizontal direction). Here, the second electrode is a transparent electrode and may be formed of indium tin oxide (ITO). The plurality of second electrodes 212-1, 212-2, 212-3, 212-4, 212-5, and 212-6 of the second electrode group 212 may be used for receiving when the position of the finger is detected. The receiving electrode of the Rx signal caused by the Tx signal input from the first electrode.

Although it is explained in the exemplary embodiment shown in FIG. 27 that the first electrode group and the second electrode group respectively include six electrodes, it should be understood that one or more other exemplary embodiments are not limited thereto. For example, in one or more other exemplary embodiments, the first electrode population and the second electrode population may comprise more than six electrodes or less than six electrodes, respectively. Further, although in FIG. 27, the electrodes of the first electrode group and the second electrode group are exemplified as simple rectangular shapes, it should be understood that one or more other exemplary embodiments are not limited thereto. For example, according to another exemplary embodiment, the shape of each electrode may be more complicated than a rectangular shape.

The driving unit 220 can transmit the electric field transmission signal (or driving signal) to the resonance circuit of the object (for example, the input object) of the touch panel 200 via capacitive coupling by applying an electric field transmission signal to the electrode of the channel electrode portion 210. . At this time, for the electrodes in the channel electrode portion 210, the driving unit 220 can apply the same electric field transmission signal by a plurality of electrodes. The electric field transmission signal can include a sinusoidal waveform signal having a predetermined resonant frequency.

The receiving unit 230 may receive an electric field receiving signal in each of the electrodes in the channel electrode portion 210 in a section in which the electric field transmission signal is not applied. In detail, the receiving unit 230 can sequentially receive the electric field receiving signals of all the electrodes by one electrode. Alternatively, receiving unit 230 may receive the electric field receiving signals of all of the electrodes from a plurality of electrodes.

The receiving unit 230 can perform various signal processing on the received response signal (for example, the electric field receiving signal). For example, the receiving unit 230 can amplify each response signal by using an amplifier. The receiving unit 230 can perform signal processing for differentially amplifying the response signal by using two response signals. The receiving unit 230 may perform signal processing for extracting only information having a predetermined frequency range from the received response signals.

The controller 240 can control the driving unit 220 and the receiving unit 230 to alternately perform an application of an electric field transmission signal and a reception electric field reception signal for each electrode. For example, the controller 240 can control the driving unit 220 to simultaneously apply the same to all the first electrodes 211-1, 211-2, 211-3, 211-4, 211-5, and 211-6 in the first time interval. The electric field transmits the signal, and the receiving unit 230 can receive the response signal of the at least one electrode (for example, 211-1) in the second time interval after applying the electric field transmission signal. Subsequently, the controller 240 can control the driving unit 220 to apply the same electric field to all of the first electrodes 211-1, 211-2, 211-3, 211-4, 211-5, and 211-6 at the same time in the third time interval. The signal is transmitted, and the receiving unit 230 can be controlled to receive the response signal of the other electrode (for example, 211-2) in the fourth time interval after the electric field transmission signal is applied. The controller 240 can repeat the above process as many times as the response signal of all the electrodes is received. In FIG. 27, since the channel electrode portion 210 includes twelve electrodes, the controller 240 can alternately perform an application/reception operation twelve times.

If a response signal is received for all of the electrodes, the controller 240 may be based on the responses received in the first electrodes 211-1, 211-2, 211-3, 211-4, 211-5, and 211-6. The position of the stylus is determined by the ratio of the signals and the ratio of the response signals received in the second electrodes 212-1, 212-2, 212-3, 212-4, 212-5, and 212-6.

For example, if the size of the response signal of one first electrode 211-3 is larger than the size of the response signals of the other first electrodes 211-1, 211-2, 211-4, 211-5, and 211-6, and one The size of the response signal of the second electrode 212-2 is greater than the size of the response signals of the other second electrodes 212-1, 212-3, 212-4, 212-5, and 212-6, and the controller 240 can determine the first The position at which the electrode 211-3 intersects the second electrode 212-2 serves as the position of the stylus pen 100.

Further, based on the response signal, the controller 240 can determine the pressure (eg, writing pressure) of the input object on the touch panel 200. As mentioned above, the response signal can vary depending on the writing pressure.

It should be understood that in one or more other exemplary embodiments, the touch panel 200 may further include a configuration different from the above configuration. For example, if the touch panel 200 is a touch screen, the display may be further included. If the touch panel 200 is an element such as a smart phone or a portable multimedia player, the touch panel 200 may further include a display, a storage unit (eg, a storage), and a communication unit (eg, a communicator, a transceiver, Network adapters, RF transmitters, etc.).

Although in the exemplary embodiment described above with reference to FIG. 27, the channel electrode portion 210 is composed of a plurality of electrodes, it should be understood that one or more other exemplary embodiments are not limited thereto. For example, according to another exemplary embodiment, the channel electrode portion 210 may be implemented by a plurality of antenna loops. Further, according to another exemplary embodiment, the channel electrode portion 210 may be in a form including a plurality of electrodes and a plurality of antenna loops.

Moreover, in the exemplary embodiment described above with respect to FIG. 27, drive unit 220, receiving unit 230, and controller 240 have been shown and described as a single component. However, the functionality of each of the above components can be implemented to be performed by a single component (eg, a controller).

Although not limited thereto, the exemplary embodiments may be embodied as computer readable codes on a computer readable recording medium. A computer readable recording medium is any data storage component that can store data that can be subsequently read by a computer system. Examples of computer readable recording media include read-only memory (ROM), random-access memory (RAM), compact disk-reading memory (CD-ROM), tape, and soft. Disc, and optical data storage components. The computer readable recording medium can also be distributed over a network coupled computer system such that the computer readable code is stored and executed in a distributed manner. Moreover, the exemplary embodiments can be rewritten as computer programs for transmission on a computer readable transmission medium (e.g., carrier wave) and received and implemented in a general purpose or special purpose digital computer that executes the program. In addition, it should be understood that in an exemplary embodiment, one or more of the above components (eg, controller 240) may include circuitry, a processor, a microprocessor, etc., and may be stored in computer readable media. Computer program in the middle.

Although the exemplary embodiments have been described above, other variations and modifications of the exemplary embodiments may be made in accordance with the present invention. Accordingly, the scope of the appended claims is intended to be construed as being inclusive of the above exemplary embodiments and all such variations and modifications.

10‧‧‧ fingers
100‧‧‧ stylus
100'‧‧‧ stylus
110‧‧‧Electrical tip
111‧‧‧Insulation
120‧‧‧Resonance Circuit Department
120'‧‧‧Resonance Circuit Department
121‧‧‧Variable Capacitors
122‧‧‧ dielectric
122a‧‧‧ first surface
122b‧‧‧second surface
123‧‧‧First electrode
123a‧‧‧ first surface
123b‧‧‧ second surface
123c‧‧‧Protruding
124‧‧‧Conductivity variable electrode
124'‧‧‧ Conductive variable electrode
124''‧‧‧ Conductive variable electrode
124a‧‧‧ end face
124'a‧‧‧ end face
124''a‧‧‧ end face
124b‧‧‧ end face
124'b‧‧‧ end face
124''b‧‧‧ end face
124'c‧‧‧Edge
124''c‧‧‧Edge
124'd‧‧‧ border
124''d‧‧‧Flexible components
124'e‧‧‧Depression
125‧‧‧Inductors
126‧‧‧ capacitor
127‧‧‧Electric conductor
127a‧‧‧ board
127b‧‧‧ board
127c‧‧‧round members
127d‧‧‧ openings
128‧‧‧second capacitor
129‧‧‧ switch
130‧‧‧ Grounding Department
131‧‧‧Electrical shell
132‧‧‧Connecting Department
133‧‧‧ screws
134‧‧‧Printed circuit board
140‧‧‧shell
141‧‧ ‧ prominence
142‧‧‧External support
142a‧‧‧guide slot
143‧‧‧External support
143a‧‧‧ Guide slot
144a‧‧‧ long hole
144b‧‧‧ long hole
145‧‧‧ openings
146‧‧‧ openings
147‧‧‧ openings
150‧‧‧Insulator
151‧‧‧First Cover
151a‧‧‧ outer circumferential surface
151b‧‧‧ ring projection
151c‧‧‧ openings
152‧‧‧second cover
152a‧‧‧ outer circumferential surface
152b‧‧‧ ring first protrusion
152c‧‧‧ openings
152d‧‧‧Ring second projection
153‧‧‧Guiding components
153a‧‧‧ openings
153b‧‧‧ ring projection
153c‧‧‧Protruding
153d‧‧‧Support
153e‧‧‧Support
153f‧‧‧ outer circumferential surface
153g‧‧‧ openings
160‧‧‧Flexible components
160'‧‧‧Flexible components
160''‧‧‧Flexible components
170‧‧‧Electrical support members
171‧‧‧First conductive support member
171a‧‧‧End section
171b‧‧‧External extension
171c‧‧‧First acceptance hole
172‧‧‧Second conductive support member
172a‧‧‧second receiving hole
172b‧‧‧End section
172c‧‧‧ third receiving hole
190'‧‧‧ writing pressure module
190''‧‧‧ writing pressure module
200‧‧‧ touch panel
210‧‧‧channel electrode
211-1, 211-2, 211-3, 211-4, 211-5, 211-6‧‧‧ first electrode
212-1, 212-2, 212-3, 212-4, 212-5, 212-6‧‧‧ second electrode
220‧‧‧ drive unit
230‧‧‧ receiving unit
240‧‧‧ Controller
300‧‧‧Coordinate measuring system
II‧‧‧ line
Line II-II‧‧
Line III-III‧‧

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in the drawings A block diagram of the configuration of the system. FIG. 2 is a block diagram illustrating a configuration of the stylus shown in FIG. 1 according to an exemplary embodiment. FIG. 3 is a view illustrating a circuit diagram of a stylus according to the first exemplary embodiment. 4 is a perspective view illustrating a writing pressure module of the stylus of FIG. 3, according to an exemplary embodiment. FIG. 5 is an exploded perspective view illustrating a writing pressure module of the stylus of FIG. 3 according to an exemplary embodiment. FIG. 6 is a cross-sectional view illustrating a dielectric body of the variable capacitor illustrated in FIG. 5, according to an exemplary embodiment. FIG. 7 is a cross-sectional view illustrating a first electrode of the variable capacitor illustrated in FIG. 5, according to an exemplary embodiment. FIG. 8 is a cross-sectional view illustrating a conductivity variable electrode of the variable capacitor illustrated in FIG. 5, according to an exemplary embodiment. FIG. 9 is a perspective view illustrating another example of a conductivity variable electrode of the variable capacitor illustrated in FIG. 5, according to an exemplary embodiment. Fig. 10 is a cross-sectional view showing the conductive variable electrode shown in Fig. 9. Fig. 11 is a perspective view showing still another example of the conductive variable electrode which forms the variable capacitor shown in Fig. 5. Fig. 12 is a cross-sectional view showing the conductive variable electrode shown in Fig. 11; FIG. 13 is a perspective view illustrating the electrical conductor shown in FIG. 5, according to an exemplary embodiment. FIG. 14 is a perspective view illustrating the housing illustrated in FIG. 5, according to an exemplary embodiment. FIG. 15 is a perspective view illustrating a plurality of covers forming the insulator illustrated in FIG. 5, according to an exemplary embodiment. FIG. 16 is a perspective view illustrating a guiding member forming the insulator illustrated in FIG. 5, according to an exemplary embodiment. 17A and 17B are perspective views illustrating a state in which the first conductive support member and the second conductive support member shown in Fig. 5 are coupled to each other, according to an exemplary embodiment. FIG. 18 is a side view illustrating another example of the elastic member illustrated in FIG. 5, according to an exemplary embodiment. 19 is a side view illustrating still another example of the elastic member shown in FIG. 5, according to an exemplary embodiment. Figure 20 is a cross-sectional view taken along line I-I of Figure 4 . 21 is a perspective view illustrating another example of a writing pressure module of the stylus shown in FIG. 3, according to an exemplary embodiment. FIG. 22 is an exploded perspective view illustrating the writing pressure module illustrated in FIG. 21, according to an exemplary embodiment. 23 is a cross-sectional view taken along line II-II of FIG. 21, according to an exemplary embodiment. FIG. 24 is a view illustrating a circuit diagram of a stylus according to a second exemplary embodiment. FIG. 25 is a perspective view illustrating a stylus according to a second exemplary embodiment. FIG. 26 is a cross-sectional view taken along line III-III of FIG. 25, according to an exemplary embodiment. FIG. 27 is a block diagram illustrating a specific configuration of the touch panel illustrated in FIG. 1 according to an exemplary embodiment.

110‧‧‧Electrical tip

111‧‧‧Insulation

121‧‧‧Variable Capacitors

122‧‧‧ dielectric

123‧‧‧First electrode

124‧‧‧Conductivity variable electrode

127‧‧‧Electric conductor

127a‧‧‧ board

127b‧‧‧ board

127c‧‧‧round members

127d‧‧‧ openings

140‧‧‧shell

141‧‧ ‧ prominence

142‧‧‧External support

142a‧‧‧guide slot

143‧‧‧External support

143a‧‧‧ Guide slot

144a‧‧‧ long hole

144b‧‧‧ long hole

145‧‧‧ openings

146‧‧‧ openings

150‧‧‧Insulator

151‧‧‧First Cover

151a‧‧‧ outer circumferential surface

151b‧‧‧ ring projection

151c‧‧‧ openings

152‧‧‧second cover

152a‧‧‧ outer circumferential surface

152b‧‧‧ ring first protrusion

152c‧‧‧ openings

152d‧‧‧Ring second projection

153‧‧‧Guiding components

153a‧‧‧ openings

153b‧‧‧ ring projection

153c‧‧‧Protruding

153d‧‧‧Support

153e‧‧‧Support

160‧‧‧Flexible components

171‧‧‧First conductive support member

171a‧‧‧End section

171b‧‧‧External extension

172‧‧‧Second conductive support member

172a‧‧‧second receiving hole

172b‧‧‧End section

190'‧‧‧ writing pressure module

Claims (15)

A stylus for inputting a position on a touch panel, the stylus comprising: a conductive tip receiving an electric field transmission signal from at least one electrode of the touch panel; and a circuit portion corresponding to the Receiving an electric field receiving signal of the electric field transmission signal; a variable capacitor disposed between the conductive tip and the circuit portion, and changing the electric field receiving signal according to a writing pressure applied to the conductive tip; And an electrical conductor disposed outside the variable capacitor and electrically connecting the conductive tip to the circuit portion. A stylus for inputting a position on a touch panel according to claim 1, wherein the variable capacitor comprises: a dielectric body including a first surface and a position opposite to the first surface a second surface; a first electrode contacting the first surface; and a conductivity variable electrode formed such that a contact area between the conductive variable electrode and the second surface of the dielectric body It varies depending on the pressure applied via the conductive tip. a stylus for inputting a position on a touch panel as described in claim 2, wherein the conductive variable electrode is formed so as to be in contact with the second surface of the dielectric body The central portion of the surface is convex from the edge portion of the surface. a stylus for inputting a position on a touch panel as described in claim 2, wherein the conductive variable electrode is formed so as to be in contact with the second surface of the dielectric body The central portion of the surface is recessed from the edge portion of the surface. A stylus for inputting a position on a touch panel as described in claim 2, wherein the conductive variable electrode is formed of a conductive rubber. A stylus for inputting a position on a touch panel as described in claim 2, further comprising an elastic member embedded in the interior of the conductive variable electrode. The stylus for inputting the position on the touch panel as described in claim 1, further comprising: a grounding portion electrically connected to the user via at least one of direct contact and capacitive coupling; and conducting A case is isolated from the electrical conductor and connected to the ground. The stylus for inputting the position on the touch panel as described in claim 1, further comprising: an elastic member for restoring the position of the conductive tip; and a housing that is tubular in shape and received The variable capacitor, wherein the housing is formed of a non-conductive material, and is provided with at least one opening through which the electrical conductor passes, and the at least one opening is formed in the housing On the outer circumference surface. A stylus for inputting a position on a touch panel according to claim 8, wherein an insulator is disposed on an outer circumferential surface of the conductive tip to make the conductive tip and the elastic The component and the variable capacitor are isolated. The stylus for inputting a position on the touch panel according to claim 9, wherein: the insulator includes a first cover and a second cover; and the first cover is disposed at the One end of the housing and supporting one end of the elastic member, and the second covering body is disposed on the outer circumferential surface of the conductive tip and supports the other end of the elastic member . A stylus for inputting a position on a touch panel according to claim 9, wherein: the insulator includes a guiding member disposed on the outer circumferential surface of the conductive tip And guiding the conductive tip in a length direction of the housing; and the guiding member supports an end of the elastic member, and a protrusion formed on an inner circumferential surface of the housing supports the The other end of the elastic member. A stylus for inputting a position on a touch panel as described in claim 9 wherein the elastic member comprises a non-conductive material. A stylus for inputting a position on a touch panel according to claim 1, wherein: the electric conductor includes a plurality of plates and a circular member, and the circular member and the plurality of plates One end of each of the plurality of plates is spaced apart from one another and disposed side by side; and an opening is formed in the circular member through which the conductive tip passes. The stylus for inputting the position on the touch panel as described in claim 8 further includes: a conductive support member having a receiving hole, the receiving hole being formed on the opposite side of the conductive supporting member In each of the ends, a first receiving hole formed in one end of the conductive supporting member is coupled to the conductive variable electrode, and wherein another one of the conductive supporting members is formed A second receiving aperture in one end is coupled to one end portion of the electrically conductive tip. The stylus for inputting the position on the touch panel as described in claim 14 further includes an insulator disposed on an outer circumferential surface of the conductive support member to make the conductivity The support member is isolated from the elastic member.